A244783 Number of length n 0..3 arrays with each partial sum starting from the beginning no more than one standard deviation from its mean.

2, 6, 20, 72, 268, 876, 3236, 12284, 42396, 159876, 614936, 2198628, 8407796, 32629532, 119560228, 461654712, 1803031416, 6724605836, 26147874800, 102596362036, 387701367548, 1515422726468, 5694815620420, 22229878552752

Offset: 1

Author

R. H. Hardin, Jul 06 2014

Keywords

• nonn

Comments

Column 3 of A244788

Examples

			Some solutions for n=10
..2....2....2....2....2....2....2....2....1....2....2....2....2....1....2....2
..2....1....0....0....1....0....0....0....2....1....0....2....2....2....2....2
..1....0....2....3....0....1....1....2....0....3....2....2....0....0....0....2
..1....1....0....1....2....3....2....2....1....0....0....2....2....2....2....0
..1....1....3....3....3....0....1....3....1....2....2....1....2....3....1....1
..0....3....2....0....1....1....1....1....3....3....3....2....2....2....0....2
..2....3....0....1....1....2....3....0....1....2....0....1....3....0....3....3
..1....0....1....2....0....2....1....1....2....0....2....1....2....2....3....0
..2....1....2....0....3....1....0....2....3....1....2....0....1....3....0....2
..0....0....2....1....1....3....2....2....3....0....1....2....0....0....1....2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210